Modelling event brokers and topics¶

Typically, topics are managed by an event broker such as Apache Kafka.

Figure 1 shows the types of metadata that integrators connectors can create with this integration service.

Figure 1: Topic metadata supported by the Topic Integrator OMIS

The structure of an event is called an EventType. The details of this structure such as the data fields in the event are described using SchemaAttributes and SchemaTypes.

Figure 2 shows the open metadata types used to represent the metadata created through this service.

Figure 2: Topic open metadata types supported by the Topic Integrator OMIS

If an EventBroker is defined, any topic created is automatically linked to it using the ServerAssetUse relationship. When an event type is created for the topic, the service automatically inserts the Schema relationship, EventTypeList entity and SchemaTypeOption relationship in between the topic and the event type.

Any schema attributes created through this interface will use the EventSchemaAttribute subtype to allow for find requests that only return schema information for events. The schema attributes also use the TypeEmbeddedAttribute classification method for defining the schema type.

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